Hibernoma

**Semantic type:** Neoplastic Process

**Definition:** A rare benign slow growing adipose tissue tumor, characterized by the presence of polygonal brown fat cells with multivacuolated and/or granular cytoplasm. The tumor is usually painless and is most often seen in young adults.

**Synonyms:** - Brown Fat Neoplasm - Brown Fat Neoplasm - Brown Fat Tumor - Brown Fat Tumor - Brown fat tumor - Fetal Fat Cell Lipoma - Fetal Fat Cell Lipoma - Fetal fat cell lipoma - HIBERNOMA, BENIGN